leggins Posted February 13, 2008 Report Share Posted February 13, 2008 A friends son has a 06 125 rev 3 which has developed a whizzing sound which seems to coming from the cyclinder / flywheel area. initally the bike lost power. He was advised to clean out the exhaust and repack the can which he did to some success as the bike regained some power but did develop this whizzing sound. any ideas......thanks Leggins Quote Link to comment Share on other sites More sharing options...
kinell Posted February 13, 2008 Report Share Posted February 13, 2008 Probably stating the obvious here but has the flywheel cover had a knock? Quote Link to comment Share on other sites More sharing options...
scorpa3 Posted February 13, 2008 Report Share Posted February 13, 2008 I hope you don't mind me stating the obvious, but the fan's not stuck on is it? Quote Link to comment Share on other sites More sharing options...
barrybaines Posted February 13, 2008 Report Share Posted February 13, 2008 Reckon Kinell is on the money here, take the flywheel cover off and check for wear and check the flywheel hasn't come loose. Try running it without the cover on if it is still there then you could have a worn or broken ring? My 04 250 started making a buzzing noise shortly before spitting half a ring out the exhaust!! Quote Link to comment Share on other sites More sharing options...
feetupfun Posted February 14, 2008 Report Share Posted February 14, 2008 Does the frequency of the buzzing follow motor RPM? Quote Link to comment Share on other sites More sharing options...
leggins Posted February 14, 2008 Author Report Share Posted February 14, 2008 yes mate it does Quote Link to comment Share on other sites More sharing options...
leggins Posted February 14, 2008 Author Report Share Posted February 14, 2008 He has checked the fly wheel and alls well there. As for the piston ring theory well that was my first thought. I will have a word and pull the head off it....ahmm thanks to all for your advice, will keep you posted cheers Leggins Quote Link to comment Share on other sites More sharing options...
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